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1.
设计了一种变增益小信号放大器,即增益可由计算机编程控制的放大器。该系统可使在一定动态范围内变化的信号,实现高精度的A/D转换,实现动态压缩。在电子电路综合型实验中,有较高的应用价值。  相似文献   

2.
描述了高Tc超导体在各种粒子辐照下的辐照效应和机理,介绍了近些年来在高Tc超导体的辐照效应研究结果,并对该领域今后的研究方向作了阐述。  相似文献   

3.
UNITANK技术先进,处理工艺选择性强,技术经济合理,易于管理,适合我国中小城市污水的治理的方向。因此成为环保工作者的研究的一个重点。本文介绍了UNITANK池的构造和处理城市生活污水的优点,同时介绍了邢台市污水处理厂中UNITANK池实际的运行状况和现存在的问题。  相似文献   

4.
Abstract

The ways in which research production is organised in contemporary universities are different both from the often commonly expressed view of the individual researcher discovering new knowledge working alone, and from the traditional professor‐assistants organisation as the basic research production unit. This article presents ‐ on the basis of an empirical study of social science research organising in four different universities ‐ a number of characteristics of how basic research organisation takes place. The most are described common features of such organisation models described. The factors constructing new more dynamic and integrated models in practice are analysed. And the demands for efficient university governance structures, to ensure the development of basic organisations which can produce short‐ and long‐term high quality and successful research, are discussed.  相似文献   

5.
Extracurricular reading as an extension of the junior middle school English teaching process,which can broaden the students' horizons.In this dissertation,the influencing factors of the junior high school students' extracurricular reading are described.According to these factors,corresponding improving measures are put forward to improve the level of learning English through English extracurricular reading.  相似文献   

6.
学习自由是一种如何对待学习过程中人的主体性的哲学,体现了学习中学习主体性的回归。高等教育自学考试是众多高等教育形式中最好体现学习自由的教育制度,但仍需改革完善,进一步提高学习的学习自由权,以培养更多更好的创新人才。  相似文献   

7.
“三言”塑造了一大批个性鲜明,风姿独特、新颖的女性形象。作者热情地歌颂了她们不畏强权,反抗黑暗势力的压迫,大胆追求婚姻自主,自强自立,自信自爱,坚毅果敢地实现人生价值的美好品格。  相似文献   

8.
ABSTRACT

The development of motor activity in children with profound mental retardation employing a special method based on mother/father dyads with her/his child is described. Both parent and child are jointly trained on the basis of a specific programme of lessons which is combined with a home training programme. The main advantages of the method are: high efficiency of lessons, effective instructions for home training, close emotional contact between parents and children, promotion of parents’ optimism and improvement of children's communication. Within this brief characterisation the content and organisation of joint training lessons are also described.  相似文献   

9.
The ways in which research production is organised incontemporary universities are different both from the oftencommonly expressed view of the individual researcher discoveringnew knowledge working alone, and from the traditionalprofessor-assistants organisation as the basic researchproduction unit. This article presents – on the basis of anempirical study of social science research organising in fourdifferent universities – a number of characteristics of how basicresearch organisation takes place. The most are described commonfeatures of such organisation models described. The factorsconstructing new more dynamic and integrated models in practiceare analysed. And the demands for efficient university governancestructures, to ensure the development of basic organisationswhich can produce short- and long-term high quality andsuccessful research, are discussed.  相似文献   

10.
IPX互联网络实验的设计与应用   总被引:1,自引:0,他引:1  
针对IPX互联网络实验的设计构造简单、手段独特、简单易行、见效快等特点,给出了实验设计目的、方法与步骤,介绍了IPX数据报及简单工作原理,列举了典型和综合应用的例子。  相似文献   

11.
对酵母菌在高浓度有机废水处理中的作用进行阐述,总结酵母菌处理技术的研究现状,对几种难处理高浓度有机废水(味精废水、橄榄油厂废水、皂素废水、果汁废水、木薯酒精废液)的酵母菌处理技术进行概括。酵母菌处理技术具有一定的经济效益与社会效益,发展前景良好。  相似文献   

12.
A relationship between creativity and misbehavior in the classroom often has been presumed by educators, but actually has had little substantiation. The present study attempts to clarify the dynamics of that relationship by determining the extent to which creativity test scores predict identification of students by teachers and/or peers as misbehavers. Intercorrelations between creativity subtests and peer perception of creative behavior suggest that students high in elaboration and in originality are more likely to be described by peers as exhibiting creative behavior. Results generally failed to support that high creativity scores predict teacher identification of students as behavior problems. However, the sociometric variables of popularity and misbehavior were significantly correlated with high creativity scores. Implications for further study are discussed.  相似文献   

13.
概述了利用光学整流、参量振荡、空气等离子体等非线性过程产生THz光的方法.根据量子光学的压缩态概念,提出利用非线性光学过程实现压缩态THz光的可能性;并论述了压缩态THz光可具有消除系统所有的经典噪声,达到最大信噪比,实现超高灵敏度、超高精度的弱光信号传输和测量的优良效果.  相似文献   

14.
电火花沉积工艺(ESD)是一种微弧焊工艺,电极材料沉积到基体表面,并于基体呈冶金结合.本文以冷作模具钢Cr12MoV为基体材料,利用电火花沉积对局部区域进行修复.研究了影响沉积层质量和沉积率的工艺参数,其中包括电容、电压和保护气.实验结果显示,虽然随着电容和电压的增大,沉积率提高,但同时也会使沉积层中的微裂纹和孔洞增加.因此,只有合理选择沉积工艺参数,才能达到一定沉积率的同时保证沉积层的质量.  相似文献   

15.
AFormalApproachtotheDesignofNetworkProtocolLuoJunzhou(罗军舟)GuGuanqun(顾冠群)(DepartmentofComputerScienceandEngineering,Southeast...  相似文献   

16.
本文介绍了以TMS320F2812 DSP为控制核心的全数字化永磁同步电机伺服控制系统的硬件和软件设计,对控制系统硬件和软件各部分的结构和功能作了详细的阐述。  相似文献   

17.
过氧化氢酶晶体的高分辨成像,由于样品本身衬度极低和为防止辐射损伤而使用极低剂量的电子束照明,因而所得象的噪声远大于结构信息,此外图象被电镜相位衬度传输函数所调制.本文讨论了过氧化氢酶高分辨显微象的处理方法.是为了发展二维生物大分子晶体高分辨电子显微象的分析方法.  相似文献   

18.
There is a common perception that Asian students relyupon rote learning and prefer passive forms oflearning, though, this appears to be incompatible withevidence of their high levels of achievement. Thisapparent dichotomy is explained by showing thatmemorisation can occur in conjunction with theintention to understand. It could also result fromstudents learning material by heart because theyperceive that is what the course and assessmentrequire. Evidence from over 90 action researchprojects is used to disprove the common assertionsthat Asian students prefer passive learning and resistteaching innovations. It is argued that motivationdisplayed by Asian students is not well described byconventional definitions in psychology textbooks.Courses which provide good career preparation are asource of motivation but it is not an extrinsic formof motivation which depresses intrinsic motivation.There are high levels of achieving motive, but itfrequently has a collective nature rather than beingindividual and competitive.  相似文献   

19.
The task of the curriculum developer is to design instructional systems which will produce consistently high levels of learning despite wide variation in pupil characteristics. This can be viewed as a cybernetic question of regulating variety in a system to produce stable and high level output. Six cybernetic principles—goal orientation, limitation of input, monitoring, control decisions, restoration of equilibrium, and positive feedback—are described, and their application to curriculum discussed. It is concluded that a cybernetic model can guide curriculum developers in designing effective learning systems.  相似文献   

20.
孙淑彦先生是岭南文坛具有一定影响力的散文作家。他在长期的学术研究和讲学中写下的系列性文化散文,容量大、内涵深、品位高,给新时期散文注入了一股强健的生命活力。文章从厚重的历史文化意识、理性思辨色彩、生动的语言表达形式三方面论述孙淑彦散文独特的艺术特色。  相似文献   

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